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Cyrtina
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Spiriferinida
Suborder:
Cyrtinoidina
Superfamily:
Cyrtinoidea
Family:
Cyrtinidae
Formal Genus Name and Reference:
Cyrtina DAVIDSON, 1859 in 1858-1863, p. 66
Type Species:
Calcoola heteroclita Defrance, 1828b, p. 156, SD OEHLERT, 1887a, p. 40
Images
(Click to enlarge in a new window)
Fig. 1252, 1 a-e .*C. heteroclita (Defrance), Middle Devonian, western Europe, a-c, ventral, posterior and lateral views, × 1.5 (Davidson, 1864), d, ventral interior, × 3, e, section of ventral valve, approximately × 2 (Oehlert, 1901).
Synonyms
Spinocyrtina, Trochalocyrtina
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (lower Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Carboniferous (Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Flanks plicate, fold and sulcus smooth, with or without prominent growth lines and, rarely, with fine pustules, cardinal platform present, jugum with prominent median process. [PITRAT (1965, p. 678) suggested that the "first unequivocal designation of the type-species" for Cyrtina was that of H ALL and CLARKE (1893, p. 44), but this is subsequent to the designation of C. heteroclita by OEHLERT (1887a, p. 40). In 1916, FREDERICKS designated two species for the genus Spinocyrtina (S. lachrimosa H ALL & CLARKE and S. hamiltonensis HALL), neither of them being clearly designated as type species. Later, in 1918b and 1926, FREDERICKS designated different type species. In 1918b (p. 145), the type species is listed as C. lachrimosa HALL & CLARKE. In 1926 (p. 413), the type species is listed as C. hamiltonensis H ALL . The species that should be retained is lachrimosa, which does not appear in the body of FREDERICKS's 1918b paper but in an appendix at the end of the volume entitled "Diagnoses generum et speciorum novorum"; nevertheless this designation seems valid.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Spiriferinida
Suborder:
Cyrtinoidina
Superfamily:
Cyrtinoidea
Family:
Cyrtinidae
Formal Genus Name and Reference:
Cyrtina DAVIDSON, 1859 in 1858-1863, p. 66
Type Species:
Calcoola heteroclita Defrance, 1828b, p. 156, SD OEHLERT, 1887a, p. 40
Images
(Click to enlarge in a new window)
Fig. 1252, 1 a-e .*C. heteroclita (Defrance), Middle Devonian, western Europe, a-c, ventral, posterior and lateral views, × 1.5 (Davidson, 1864), d, ventral interior, × 3, e, section of ventral valve, approximately × 2 (Oehlert, 1901).
Synonyms
Spinocyrtina, Trochalocyrtina
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (lower Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Carboniferous (Visean)
Ending International Stage:
Visean
Fraction Up In Ending Stage:
100
Ending Date:
330.34
Description
Flanks plicate, fold and sulcus smooth, with or without prominent growth lines and, rarely, with fine pustules, cardinal platform present, jugum with prominent median process. [PITRAT (1965, p. 678) suggested that the "first unequivocal designation of the type-species" for Cyrtina was that of H ALL and CLARKE (1893, p. 44), but this is subsequent to the designation of C. heteroclita by OEHLERT (1887a, p. 40). In 1916, FREDERICKS designated two species for the genus Spinocyrtina (S. lachrimosa H ALL & CLARKE and S. hamiltonensis HALL), neither of them being clearly designated as type species. Later, in 1918b and 1926, FREDERICKS designated different type species. In 1918b (p. 145), the type species is listed as C. lachrimosa HALL & CLARKE. In 1926 (p. 413), the type species is listed as C. hamiltonensis H ALL . The species that should be retained is lachrimosa, which does not appear in the body of FREDERICKS's 1918b paper but in an appendix at the end of the volume entitled "Diagnoses generum et speciorum novorum"; nevertheless this designation seems valid.]